Frequently Asked Questions (FAQ)

Q1：What controllers does the DLM02 support?
A1：Any Symphony Plus AC 800M, Freelance AC 900F, or third-party PLC that speaks Modbus TCP or PROFINET IO.

Q2：Can I mix copper and fiber links on the same module?
A2：Yes. Two copper RJ-45s and one ST fiber port may be used concurrently for redundant paths.

Q3：Is a separate power supply required for redundancy?
A3：The DLM02 accepts dual 24 V DC feeds; if one fails the unit stays online without reboot.

Q4：How do I upgrade firmware?
A4：Connect a laptop to the USB-C service port, authenticate, and load the signed package via the web UI. No plant shutdown needed.

Q5：What cybersecurity features are built in?
A5：Secure boot, TLS-encrypted configuration, role-based access, and Syslog forwarding for audit trails.

Q6：Does the module log diagnostics?
A6：Yes. It stores the last 10 000 events with time-stamp; logs can be exported in CSV or pushed via SNMP traps.

Q7：What is the MTBF?
A7：Calculated MTBF exceeds 150 000 hours at 40 °C per MIL-HDBK-217F.

Q8：Can I daisy-chain two DLM02s?
A8：Absolutely. Use port bonding or ring topology; the module’s RSTP engine prevents broadcast loops.

Q9：What happens if a port is shorted?
A9：Auto-shutdown isolates the fault; other ports continue service and an alarm is flagged to the DCS.

Q10：Is a conformal-coated version available?
A10：All production units ship with silicone coating for chemical and salt-mist resistance.